Legal marijuana has led to increased use, risk for abuse -Report

A new study has discovered that rates of marijuana use and addiction have gone up in American states that have recently legalized the drug.
The problem was most severe for those over age of 26, with cases of addiction rising by a third. The findings has complicated the debate around legalization.

In a new study, published in JAMA Psychiatry, a monthly peer-reviewed medical journal published by the American Medical Association which covers research in psychiatry, mental health, behavioral sciences, the increase in cannabis usage they found was considerable. The number of respondents over the age of 26 who claimed to have used the drug in the last month went up by 23% compared with their counterparts in states that have yet to legalize. Abuse of the drug by this group rose by 37%.

Cannabis use disorder, also known as CUD or cannabis/marijuana addiction, is a psychological disorder described in DSM 5 as “the continued use of cannabis despite clinically significant impairment.” This includes people being unable to cut down on their usage despite wanting to, those who often use it despite finding it severely impairs their ability to function, or those who are putting themselves in danger to secure access to the drug.

While an understanding that marijuana can be addictive has existed for some time, and the image of the pothead who smokes so much they can hardly function is prevalent in our society, the effects of legalization on addiction rates have somehow gone understudied until now. Importantly, previous studies had failed to consider usage rates amongst populations over the age of 25.

Teen usage rose by 25%, and addiction rates rose as well. This increase was small, though, and the authors have suggested it may be due to an unknown factor. The rate of usage or abuse for respondents between the ages of 18 and 25 did not increase at all.

After breaking the results down by demographics, the primary finding held; adults over the age of 26 are using marijuana more often when it is legalized, and they are starting to use it too much.

What does this mean for society and drug users?

While claims of “reefer madness” are greatly exaggerated, marijuana has several well established and thoroughly studied side effects. While occasional use isn’t terribly harmful, addiction can be. Lead author Magdalena Cerdá of New York University explains in the study that heavy marijuana use is associated with “psychological and physical health concerns, lower educational attainment, decline in social class, unemployment, and motor vehicle crashes.”

A substantial increase in the number of people who are addicted to the stuff will incur costs to society down the line.

Of course, a 37% increase in problematic usage means that the percentage of adults smoking too much went from .9% to 1.23% of the population responding to the survey. This makes it far less prevalent than issues with alcohol, which affected around 6% of all Americans in 2018.

Recently, Big Think’s Philip Perry wrote a piece about how legalization could improve the health of millions by allowing the government to regulate the purity of commercially sold marijuana. This remains true. However, it must be weighed against the findings of this study, which suggests that at least some of these health gains will be wiped out by increased addiction rates.

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